Diagonal Relationship

Q. The true statements among the following is

1. Li and Mg exhibit diagonal relationship
2. O has the least electron affinity in the group 16 elements
3. Nitrogen has positive electron gain enthalpy
4. all of the above

Q. Diagonal relationship is shown by

1. All elements with their diagonally opposite elements.
2. All elements of $3^{rd}$ and $4^{th}$ periods
3. Some of the elements of $2^{nd}$ and $3^{rd}$ periods
4. Elements of d-block

Q. The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is

1. Both are found together in nature
2. Both have nearly the same size
3. Both have similar electronic configuration
4. The ratio of their charge and size (i.e charge density) is nearly the same

Q. Which of following is true for both beryllium and aluminium ?

1. Forms oxide layer to prevent further oxidation
2. Forms chlorine-bridged structure in vapor phase
3. Have strong tendencies to form complexes
4. All of the above.

Q. Beryllium and aluminium exhibit many properties which are similar. But, they differ in:

1. Forming covalent halides
2. Forming polymeric hydrides
3. Exhibiting maximum covalency in compounds
4. Exhibiting amphoteric nature in their oxides

Q.

The diagonal relationship is shown by certain elements of which periods?

1. $2^{nd}$ and $3^{rd}$

2. $3^{rd}$ and $4^{th}$

3. $4^{th}$ and $5^{th}$

4. $1^{st}$ and $2^{nd}$